Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cau treo » cau theo, cau tren, cau triet
su sach » so sach, vu sach
van cau » van dau, van hau, van chat
truc va » thuc va, thuc vat, trung va
y nang » ky nang, ly nang, v nang
tuc va » thuc va, tuc xa, thuc vat
vi cau » va cau, ve cau, di cau
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x hoi. hieu van cau ((((tuc va) OR (duc va))) OR (truc va)) hanh vi cau treo~.
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. hieu van cau ((((tuc va) or (duc va))) or (truc va)) hanh vi cau treo*.